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pid1: log the reason why restart will or will not happen

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I was trying to figure out why the restart was not happening, and it wasn't
at all obvious. Let's add a nice debug message.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-10-29 09:39:25 +01:00
parent adc09af234
commit ebc57b89c6
1 changed files with 24 additions and 6 deletions
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30
src/core/service.c
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@ -1669,21 +1669,28 @@ static int cgroup_good(Service *s) {
return r == 0;
}
static bool service_shall_restart(Service *s) {
static bool service_shall_restart(Service *s, const char **reason) {
assert(s);
/* Don't restart after manual stops */
if (s->forbid_restart)
if (s->forbid_restart) {
*reason = "manual stop";
return false;
}
/* Never restart if this is configured as special exception */
if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status)) {
*reason = "prevented by exit status";
return false;
}
/* Restart if the exit code/status are configured as restart triggers */
if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status)) {
*reason = "forced by exit status";
return true;
}
*reason = "restart setting";
switch (s->restart) {
case SERVICE_RESTART_NO:
@ -1754,8 +1761,19 @@ static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart)
end_state = SERVICE_FAILED;
}
if (allow_restart && service_shall_restart(s))
s->will_auto_restart = true;
if (!allow_restart)
log_unit_debug(UNIT(s), "Service restart not allowed.");
else {
const char *reason;
bool shall_restart;
shall_restart = service_shall_restart(s, &reason);
log_unit_debug(UNIT(s), "Service will %srestart (%s)",
shall_restart ? "" : "not ",
reason);
if (shall_restart)
s->will_auto_restart = true;
}
/* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
* SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */